Down draft plumber&#39;s furnace



July 18, 1933. w C L ON 1,919,093

DOWN DRAFT PLUMBER'S FURNACE Filed April 27, 1932 2 Sheets-Sheet l W J. L 0ZZz3m/t,

July 18, 1933. w J CQLLISON 1,919,093

DOWN DRAFT PLUMBER'S FURNACE Filed April 27, 1932 ZSheets-Sheet 2 1' I I l I l I I I F I I Z? I /7 x 3W W J ('aZZzSan.

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Patented July 18, 1933 PA.i liii"ii" LDOHN DRAFT ILUIE'IBEES EEURETACE Application filed April 2'7,

The invention relates to improvements in plumbers furnaces of the type using liquid fuel and has for its principal object the unprovenieut of such furnaces to theend that they will be more efiicient in operation, operating effectively in high winds, and that Wlii be economical in use of fuel.

A further object of the invention is the provision of an improved coi'istructio:i of

fire pot and, burner for phunbers furnares to the end that said parts may be used as I'QHQWtl I arts or replacement parts for furnaces already in use.

A further object of the invention is the provision in a plumbers furnace of a fire pot and burner construction that is can; in one piece, the burner including a tube coniinunicating with the lower portion of the fire pot and arcuate in shape so that its free end into which the fuel is fed. opens upwardly to provide a down draft structure so that the Flame most efiieiently heats the tube and the heated tube in turn creates a hot flame that entirely consumes the fuel and provides a very efiicimit heat for the furnace.

The invention will. be described in detail hereinafter and will be found illustrated in the accompanying drawings, in which Figure 1 is side view in elevation of the improved piuuibers furnace,

Figure 2 is a top plan view Figure 3 is a sectional detail of the fire pot on a plane indicated by the line 3-3 of Figure 1,

Figure 4 is a sectional. detail on a plane indicated by the line 44 of Figure 1, and

Figure 5 is a sectional detail on a plane indicated by the line 55 of Figure 1. and

Figure 6 is a view on an enlarged scale of the plumbers furnace partly broken away and partly in section.

In the drawings similar reference enuracters are used to designate corresponding parts in all of the views.

The plulnbcrs furnace is of the type utilizing gasoline or other liquid fuel, and 10 designates the storage tank for the fuel, and 11 the usual hand pump for creating air pressure in the tank to force the gasoline 1932. Serial no. 607,844.

out of the tank through the supply tube l2, l3 designating a valve in said tube 12.

A grate 14 is spaced and supported above the tar-iii; 10 by means of legs .15 that are secured in nor 16 on the top of the tank l() and has a bail l7 pivot-ally secured thereto. 18 indicates a lire t that is riveted or ions of an outstanding flange 19 to grate 14, said fire pot 18 being li o\v.l-sha i ed as shown, and 20 desig nr'es a tu ular burner counnunieating with the lire 18 through the bottom 2-1 thereof, and bei shown at 22 and has its L outwardly as shown at 233 to add cienoy of the mixture of air with the g. entering the tube through a nozzle The nozzle 24- is on the end of a fuel sup 'iiy tube that is connected to the tube 1.2 by means of a union 26, and leads thron the fire pot 18 wherein it is coiled as shown at 2'7, the coils being arranged slightly conical shown in Figure 6. 'ihe needle valve 28 in the nozzle 24 controls the gas suppiiei'i to the burner and a damper plate pivotally mounted shown at 0 on an ear or projection 33 on the end of the burner ibe 20 controis the air mixture supplied to are burner, said damper plate being provided with an ai -[late slot 32 to receive tlr end of the nozzle 2 1.

33 designates a ieg on the tubular burner that threadedly engages the boss 3-1 on a fender plate 35 that nounted on the bosses 1C and supported by means of lugs or projoctions 3G thereon. The bottom 21 of the fire pot 18 is provided with a plurality of openings that mix air with the flame from the burner tube and furnishes an extremely hot flame in the fire pot.

Because of the areuate shape of the burner tube .20 and its open end extending upwardly, a down draft is provided and the flame gener Q-GCl in the upper end of the tube by st ilnng the curved portion 22 heats this to a high degree and thereby adds to the efficiency of the burner, the down draft structure making it possible to operate the furnace in very high winds. It will also be apparent that the provision of the down draft burner permits of using the burner ity as ing upwardly providing a down draft burner, a leg on said tubular burner, a fender plate supported above the tank and providing a heat shield therefor, the last mentioned leg secured to said plate, the means for conveying the fuel consisting of a tube traversing said fire pot and coiled therein, a valved nozzle on said tube directed into the burner, a damper plate pivotally mounted on the burner and having a slot therein to receive said nozzle.

WILLIAM J. COLLISON. 

